document.write( "Question 837564: A truck traveled the first 80 miles of a trip at one speed and the last 105 miles at an average speed of 5 miles per hour less. The entire trip took 5 hours. What was the average speed for the first part of the trip? \n" ); document.write( "
Algebra.Com's Answer #504648 by josgarithmetic(39620)![]() ![]() ![]() You can put this solution on YOUR website! Here will be shown help to start, but not the whole solution.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Key idea is R*T=D, R for rate, T for time, D for distance.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "First 80 miles at the speed, r. \n" ); document.write( "Last 105 miles at the speed r-5.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "_______________speed_________time_________distance \n" ); document.write( "First___________r____________(____)________80 \n" ); document.write( "Last___________r-5___________(____)________105 \n" ); document.write( "TOTAL________________________5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You need to fill the information for the two time quantities. You know that the equation , r*t=80, so you can solve this for t, and that gives the expression for the First time. You understand what to do for the \"Last\" time? \r \n" ); document.write( "\n" ); document.write( "Can you continue and finish this? \n" ); document.write( " |